from flask import abort
from flask import current_app, jsonify
from flask import json
from flask import render_template
from flask import request
from flask import session,g

from info import constants, db
from info.models import News, User, Comment, CommentLike
from info.modules.news import news_blu
from info.utils.common import user_login_data
from info.utils.response_code import RET

@news_blu.route('/comment_like',methods=["POST"])
@user_login_data
def comment_like():
    """
    点赞评论
    :return:
    """
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR,errmsg="用户未登录")

    # 1.获取参数(评论id：comment_id,新闻id：news_id,action:
    comment_id = request.json.get("comment_id")
    news_id = request.json.get("news_id")
    action = request.json.get("action")

    # 2.校验参数
    if not all([comment_id, news_id, action]):
        return jsonify(errno=RET.PARAMERR, errmsg='参数错误')

    if action not in ["add","remove"]:
        return jsonify(errno=RET.PARAMERR, errmsg='参数错误')

    try:
        comment_id = int(comment_id)
        news_id = int(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg='参数错误')

    # 3通过评论id查找需要点赞的评论模型
    try:
        comment = Comment.query.get(comment_id)
    except Exception as e:
        return jsonify(errno=RET.PARAMERR, errmsg='参数错误')
    if not comment:
        return jsonify(errno=RET.NODATA, errmsg='评论不存在')

    if action == "add":
        # 点赞评论，初始化评论模型
        comment_like_model = CommentLike()
        comment_like_model.user_id = user.id  # 谁评论
        # comment_like_model.news_id = comment.id  # 评论的那条新闻
        comment_like_model.comment_id = comment_id
        db.session.add(comment_like_model)
        comment.like_count += 1
    else:
        # 取消点赞,获取到点赞对象
        comment_like_model = CommentLike.query.filter(CommentLike.user_id==user.id,CommentLike.comment_id==comment_id).first()
        if comment_like_model:
            db.session.delete(comment_like_model)
            # comment_like_model.delete()
            comment.like_count -= 1

    try:

        db.session.commit()
    except Exception as e:
        db.session.rollback()
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg='数据库查询错误')
    # 4响应
    return jsonify(errno=RET.OK, errmsg='OK')


@news_blu.route('/news_comment',methods=["POST"])
@user_login_data
def comment_news():
    """
    评论新闻和评论新闻下方的新闻
    :return:
    """
    # 取出用户模型
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR,errmsg="用户未登录")

    # 1.获取参数（评论新闻news_id,评论parent_id，评论内容comment）
    news_id = request.json.get("news_id")
    parent_id = request.json.get("parent_id")
    comment_content = request.json.get("comment")
    # 2判断参数
    if not all([news_id, comment_content]):
        return jsonify(errno=RET.PARAMERR, errmsg='参数错误')

    try:
        news_id = int(news_id)
        if parent_id:
            parent_id = int(parent_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg='参数错误')
    try:
        news = News.query.get(news_id)
    except Exception as e:
        return jsonify(errno=RET.PARAMERR, errmsg='未查询到数据')
    if not news:
        return jsonify(errno=RET.NODATA, errmsg='未查询到数据')
    # 3.初始化评论模型
    comment = Comment()
    comment.news_id = news_id
    comment.user_id = user.id
    comment.content = comment_content
    if parent_id:
        comment.parent_id = parent_id
    try:
        db.session.add(comment)
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
        return jsonify(errno=RET.DBERR, errmsg='提交失败')

    return jsonify(errno=RET.OK, errmsg='OK', data=comment.to_dict())


@news_blu.route('/news_collect', methods=["POST"])
@user_login_data
def news_collect():
    """
    1 接受参数：news_id ,action("collect","cancel_collect")
    2 校验参数
    3 查询新闻，并判断新闻是否存在
    :return:
    """
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR,errmsg='用户未登录')
    news_id = request.json.get('news_id')
    action = request.json.get('action')

    if not all([news_id, action]):
        return jsonify(errno=RET.PARAMERR,errmsg='参数错误')
    if action not in ["collect","cancel_collect"]:
        return jsonify(errno=RET.PARAMERR,errmsg='参数错误')
    try:
        news_id = int(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg='参数错误')
    news = None
    # 3 查询新闻
    try:
        news = News.query.get(news_id)
    except Exception as e:
        return jsonify(errno=RET.PARAMERR, errmsg='未查询到数据')
    if not news:
        return jsonify(errno=RET.NODATA, errmsg='未查询到数据')
    if action == "cancel_collect":
        # 取消收藏
        if news in user.collection_news:
            user.collection_news.remove(news)
    # 4 收藏
    else:
        if news not in user.collection_news:
            # 添加新闻到用户收藏的列表
            user.collection_news.append(news)
    return jsonify(errno=RET.OK, errmsg='OK')


@news_blu.route('/<int:news_id>')
@user_login_data
def news_detail(news_id):

    user = g.user
    # if not user:
    #     return jsonify(errno=RET.SESSIONERR, errmsg='用户未登录')

    # 右侧新闻的排行逻辑
    list_news = []
    try:
        list_news = News.query.order_by(News.clicks.desc()).limit(constants.CLICK_RANK_MAX_NEWS)
    except Exception as e:
        current_app.logger.error(e)
    news_dict_li = []
    for news in list_news:
        news_dict_li.append(news)

    # 查询新闻详情
    news = None
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(error=RET.DBERR, errmsg='查询错误')
    if not news:
        abort(404)
    news.clicks += 1

    #向前段传递一个变量来判断是否收藏
    is_collected = False
    # 如果用户已经登陆
    if user:
        # 如果新闻已经在用户收藏列表里面
        if news in user.collection_news:
            is_collected = True
    # 查询评论数据
    try:
        comments = Comment.query.filter(Comment.news_id==news_id).order_by(Comment.create_time.desc()).all()
    except Exception as e:
        return jsonify(error=RET.DBERR, errmsg='查询错误')
    # 查询当前用户
    comment_like_ids = []
    if g.user:
        try:
            comment_ids = [comment.id for comment in comments]
            comment_likes = CommentLike.query.filter(CommentLike.comment_id.in_(comment_ids),CommentLike.user_id==g.user.id).all()
            comment_like_ids = [comment_like.comment_id for comment_like in comment_likes]
        except Exception as e:
            current_app.logger.error(e)
    comment_dict_li = []
    for comment in comments:
        comment_dict = comment.to_dict()
        # 代表没有点赞
        comment_dict["is_like"] = False
        # 判断当前评论是否被点赞
        if comment.id in comment_like_ids:
            comment_dict["is_like"] = True
        comment_dict_li.append(comment_dict)

    data = {
        "user": user.to_dict() if user else None,
        "news_dict_li": news_dict_li,
        "news": news.to_dict(),
        "is_collected": is_collected,
        "comments": comment_dict_li
    }

    return render_template('news/detail.html', data=data)

